MIC5246_02 Datasheet, PDF (1/12 Pages) Micrel Semiconductor – 150mA μCap CMOS LDO Regulator

MIC5246
Micrel
MIC5246
150mA µCap CMOS LDO Regulator
Final Information
General Description
The MIC5246 is an efficient, precise CMOS voltage regulator
optimized for low-noise applications. The MIC5246 offers
better than 1% initial accuracy, extremely-low-dropout volt-
age (typically 150mV at 150mA) and constant ground current
(typically 85µA)over load . The MIC5246 features an error
flag that indicates an output fault condition such as overcurrent,
thermal shutdown and dropout. The MIC5246 provides a very
low noise output, ideal for RF applications where quiet
voltage sources are required.
Designed specifically for hand-held and battery-powered
devices, the MIC5246 provides a TTL-logic-compatible en-
able pin. When disabled, power consumption drops nearly to
zero.
The MIC5246 also works with low-ESR ceramic capacitors,
reducing the amount of board space necessary for power
applications, critical in hand-held wireless devices.
Key features include current limit, thermal shutdown, a push-
pull output for faster transient response, and an active clamp
to speed up device turnoff. Available in the IttyBitty™ SOT-23-5
package, the MIC5246 also offers a range of fixed output
voltages.
Features
• Error flag indicates fault condition
• Ultralow dropout—100mV @ 100mA
• Load independent, ultralow ground current: 85µA
• 150mA output current
• Current limiting
• Thermal Shutdown
• Tight load and line regulation
• “Zero” off-mode current
• Stability with low-ESR capacitors
• Fast transient response
• TTL-Logic-controlled enable input
Applications
• Cellular phones and pagers
• Cellular accessories
• Battery-powered equipment
• Laptop, notebook, and palmtop computers
• PCMCIA V_CC and V_PP regulation/switching
• Consumer/personal electronics
• SMPS post-regulator/dc-to-dc modules
• High-efficiency linear power supplies
Ordering Information
Part Number
Marking Voltage
MIC5246-2.6BM5
LT26
2.6V
MIC5246-2.7BM5
LT27
2.7V
MIC5246-2.8BM5
LT28
2.8V
MIC5246-2.85BM5
LT2J
2.85V
MIC5246-3.0BM5
LT30
3.0V
MIC5246-3.3BM5
LT33
3.3V
Other voltages available. Contact Micrel for details.
Junction Temp. Range
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
Package
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
Typical Application
47kΩ
V_IN
MIC5246-x.xBM5
1
5
V_OUT
2
Enable
Shutdown
3
EN
EN (pin 3) may be
connected directly
to IN (pin 1).
C_OUT
4
FLG
C_FLG
Low-Noise Regulator Application
IttyBitty is a trademark of Micrel, Inc.
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 [phone] • fax + 1 [phone] • http://www.micrel.com
June 2000
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MIC5246